. Nature . re-cognised that the distinction between the sun and astar was an artificial and accidental one, and thatthe studv of one was a necessary complement to thestudv of the other. The danger of being over-whelmed bv the additional subjects is not great, be-cause onlv a few well-defined portions of astrophysicsare adapted for investigation by international co-ooeration. .At the conclusion of an interesting dis-cussion, the vote went unanimouslv in favour of .A beginning of the new order of things wasmade at once, and a committee was appointed, withProf. E. Pickering as chairma
. Nature . re-cognised that the distinction between the sun and astar was an artificial and accidental one, and thatthe studv of one was a necessary complement to thestudv of the other. The danger of being over-whelmed bv the additional subjects is not great, be-cause onlv a few well-defined portions of astrophysicsare adapted for investigation by international co-ooeration. .At the conclusion of an interesting dis-cussion, the vote went unanimouslv in favour of .A beginning of the new order of things wasmade at once, and a committee was appointed, withProf. E. Pickering as chairman, to discuss the pos-sibilitv of coming to an agreement on the classifica-tion of stellar spectra. The next meeting of the union will be held at Bonnin the vear 1913. .Arthur Schuster. 464 NATURE [October 13, 1910 POPULAR BOOKS ON BIOLOGICAL SUBJECTS. (i)T^ HE first of these books forms vol. iv. of the hand- ■ somelv got-up and well-illustrated Science in .Modern Life. The first eighty-eight pages are a. Fig. I.—Transference of pollen to the bodies of insects by means of mechanism of the percussive type.(i) Part of an inflorescence of Salvia glnthwsa ; the right-hand flower is being visited by a humble-bee, and the pollen-covered anther is in the act of sttiking the insects back. (2) Another part of thesame inflorescence with three open flowers in different stages of development : the lower flower on theleft-hand side is being visited by a humble-bee which carries on its back pollen from a younger flowerand is rubbing it off on to the deflexed stigma. (3) A stamen of Sahia gliitiiiosa with rockingconnective. (4) Longitudinal section through a flower of the same plant. The arrow indicates thedirection in which humble-hees advance towards the interior of the flower. (5) Same section ; thelower arm of the connective lever is pushed backward, and in consequence the pollen-covered anther atthe end of the other arm of the lever is defle.\ed.—From Science in Modern Life. contin
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